By Masao Nakanishi (auth.), Yujiro Ogawa, Ryo Anma, Yildirim Dilek (eds.)
Accretionary prisms in convergent margins are typical laboratories for exploring preliminary orogenic methods and mountain construction episodes. also they are a tremendous component to continental development either vertically and laterally. Accretionary prisms are seismically hugely energetic and their inner deformation through megathrusting and out-of-sequence faulting are an important hindrance for earthquake and tsunami harm in lots of coastal towns round the Pacific Rim. The geometries and buildings of recent accretionary prisms were good imaged seismically and during deep drilling initiatives of the sea Drilling software (and lately IODP) over the past 15 years. higher realizing of the spatial distribution and temporal development of accretionary prism deformation, structural and hydrologic evolution of the décollement sector (tectonic interface among the subducting slab and the higher plate), chemical gradients and fluid circulation paths inside accretionary prisms, contrasting stratigraphic and deformational framework along-strike in accretionary prisms, and the distribution and ecosystems of organic groups in accretionary prism settings is most crucial in studying the evolution of old advanced sedimentary terrains and orogenic belts when it comes to subduction-related approaches.
This ebook is a set of interdisciplinary papers documenting the geological, geophysical, geochemical, and paleontological beneficial properties of contemporary accretionay prisms and ditchs within the northwestern Pacific Ocean, according to many submersible dive cruises, ODP drilling tasks, and geophysical surveys over the last 10 years. it is usually numerous papers featuring the result of systematic built-in experiences of modern to old on-land accretionary prisms compared to smooth analogues. the person chapters are information and snapshot wealthy, offering a huge source of data and data from those serious parts of convergent margins for researchers, college individuals, and graduate and undergraduate scholars. As such, the ebook could be an important and detailed contribution within the extensive fields of world tectonics, geodynamics, marine geology and geophysics, and structural geology and sedimentology.
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Additional info for Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin
7, 10, 13, and 16. HR Hokkaido Rise, ER Erimo Seamount, K1 DaiichiKashima Seamount, MG Mogi Seamount. 1 12 M. Nakanishi Fracture Zone, east of the Izu-Ogasawara Trench, is identified by Nakanishi et al. (1989) from magnetic anomaly lineations and examination of single-beam bathymetric data. The Kashima Fracture Zone is characterized by complex trough morphology (Nakanishi 1993). The 30 km-wide trough is bounded by ridges. The expression of the fracture zone is diminished by closing seamounts near 34°N.
Nakanishi Fracture Zone, east of the Izu-Ogasawara Trench, is identified by Nakanishi et al. (1989) from magnetic anomaly lineations and examination of single-beam bathymetric data. The Kashima Fracture Zone is characterized by complex trough morphology (Nakanishi 1993). The 30 km-wide trough is bounded by ridges. The expression of the fracture zone is diminished by closing seamounts near 34°N. The western side of the fracture zone is shallower than the eastern side. Vertical relief of the seafloor ranges from 400 to 1,000 m.
1991, 1996), Iwabuchi et al. (1996), and Kuwano et al. (1997). However, the significance of the trench topography with regard to its tectonic features has not yet been discussed, although the erosional character of the trench may be greatly affected by the geology of the oceanward slope. 2 Oceanward Slope Topography and Geology off Miyako Ogawa and Kobayashi (1994) briefly described the topography of the toe of the oceanward slope of the northern Japan trench off Miyako, and Kobayashi et al. (1998) discussed its tectonic significance.
Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin by Masao Nakanishi (auth.), Yujiro Ogawa, Ryo Anma, Yildirim Dilek (eds.)